Pfizer’s confidential document shows adverse events reported following vaccination; it doesn’t demonstrate that the vaccine caused the events or is unsafe
Pfizer’s document released by the U.S. Food and Drug Administration contains information about adverse events that occurred following vaccination. Adverse events are health problems that occur after vaccination but aren’t necessarily caused by the vaccine. Therefore, these reports don’t establish a causal relationship between the events and the vaccine. These reports alone thus are insufficient to demonstrate that the Pfizer-BioNTech COVID-19 vaccine caused any new side effects or is unsafe.